Monthly Weather Bulletin
Malaysia is currently in the phase of the Southwest Monsoon generally regular surface winds blowing from the southwest, where the weather is relatively dry compared to other seasons.
Overall, weather conditions in Peninsular Malaysia in July 2015 is wetter than June 2015. Most areas received rainfall on the average up to above average. But drier weather conditions recorded in some areas around the southern Terengganu, interior Pahang, Selangor and Perak south.
In Sarawak, most areas experienced dry weather conditions with rainfall below average, except the Kuching and Sibu recorded a rainfall average. Accumulated rainfall is between 50 mm to 200 mm.
In Sabah, most of the area received average rainfall below except in the west of Sabah and Kudat has received average above rainfall with percentage anomalies of above 60%. This is influenced by the effects of Cyclone Linfa crossing the South China Sea that brought strong winds and thunderstorms in Sabah waters.
A record number of rainy days in main stations shows in Peninsular Malaysia, Batu Embun Meteorological Station recorded the fewest number of rainy days of 8 days while Alor Setar Meteorological Station recorded a total rainfall of 21 days at most. The range of the number of rainy days in Sarawak is 10 days recorded in Sri Aman Meteorological Station and 15 days in Kapit and Miri Meteorological Station. For Sabah, the range of the number of rainy days recorded between 7 days and 16 in Sandakan Meteorological and Ranau, Kota Kinabalu, Keningau and Labuan Meteorological Station.
Most areas in Malaysia recorded an average temperature higher than the long-term average in July. In Peninsular Malaysia, the largest positive deviation is +1.8 recorded in Mersing Meteorological Station, while the lowest deviation was 0.1 have been recorded in Butterworth Meteorological Station. For the state of Sarawak, the largest positive deviation of +1.3 was recorded in Kuching and Miri Meteorological Station while the smallest deviation, 0.7 were recorded in Sibu and Kapit Meteorological Station. For the Sabah, the largest positive deviation of +1.6 was recorded in Sandakan Meteorological Station while the smallest deviation, 0.5 recorded in Kudat Meteorological Station.
In the highlands, Cameron Highlands Meteorological Station recorded a temperature range between 14.7 ° C and 24.6 ° C with a mean temperature of 18.4 ° C.
Most major meteorological stations recorded the amount of solar radiation higher than the average. The average daily solar radiation range lowland areas is from 15.60 MJm-² was recorded in Bayan Lepas Meteorological Station and 21.47 MJm-² recorded at Sepang KLIA Meteorological Station. The average solar radiation is recorded in the highlands, Cameron Highlands Meteorological Station is 12.85 MJm-². The largest positive deviation from normal is +2.40 MJm-² Meteorological Station recorded in Subang while the largest negative deviation is -1.78 MJm-² were recorded in Bayan Lepas Meteorological Station.
The average daily evaporation rate lowland areas is recorded range of 3.1 mm/day in Kluang Meteorological Station and 5.1 mm/day Miri Meteorological Station. The largest positive deviation from the average is 1.3 mm/day were recorded in Chuping Meteorological Station and Sandakan, while the largest negative deviation of -0.5 mm/day were recorded at the Meteorological Station Ipoh and Alor Setar. Meanwhile, the daily evaporation rate recorded in Cameron Highlands Meteorological Station is 1.6 mm/day with deviation from an average of -0.4 mm/day.
FIGURE 1 : Rainfall Map for Malaysia
FIGURE 2a : Mean Monthly Temperature
FIGURE 2b : Mean Monthly Maximum Temperature
FIGURE 2c : Mean Monthly Minimum Temperature
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